Silica sulfuric acid: a versatile and reusable heterogeneous catalyst for the synthesis of N-acyl carbamates and oxazolidinones under solvent-free conditions
Silica sulfuric acid catalyzes efficiently the reaction of carbamates and oxazolidinones with anhydrides under solvent-free conditions. All the reactions were done at room temperature and the N-acyl carbamates and oxazolidinones were obtained with high yields and purity via an easy work-up procedure. This method is attractive and is in a close agreement with green chemistry.
KEY WORDS: N-Acyl carbamates, N-Acyl oxazolidinones, Silica sulfuric acid, Solvent-free
Bull. Chem. Soc. Ethiop. 2011, 25(1), 151-155.